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SAE-AISI H19 Steel vs. R30003 Cobalt

SAE-AISI H19 steel belongs to the iron alloys classification, while R30003 cobalt belongs to the cobalt alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H19 steel and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
83
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
970 to 1720

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1540
1400
Melting Onset (Solidus), °C 1490
1440
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 29
13
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 22
95
Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 7.5
8.0
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 110
400

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 68
32 to 57
Strength to Weight: Bending, points 22 to 43
26 to 38
Thermal Diffusivity, mm2/s 7.9
3.3
Thermal Shock Resistance, points 21 to 59
26 to 45

Alloy Composition

Boron (B), % 0
0 to 0.1
Carbon (C), % 0.32 to 0.45
0 to 0.15
Chromium (Cr), % 4.0 to 4.8
19 to 21
Cobalt (Co), % 4.0 to 4.5
39 to 41
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 85.5
10 to 20.5
Manganese (Mn), % 0.2 to 0.5
1.5 to 2.5
Molybdenum (Mo), % 0.3 to 0.55
6.0 to 8.0
Nickel (Ni), % 0 to 0.3
14 to 16
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.2 to 0.5
0 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 3.8 to 4.5
0
Vanadium (V), % 1.8 to 2.2
0

Comparable Variants